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' H. ADLER.

Domestic Boiler.

No. 69,890. Paented Oct. 15.1862.

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v Letters .Patent No. 69,890, dated October 15, 1867,

IMPROVEMENT IN BOILERS.

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TO WHOM IT`MA-Y CONCERN:

Be it known that I, HENRY ADLER, of Yellow Springs, Greene county, Ohio, have invented a new and useful Cooking-Vessel; and I hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing, makingpart 'of this specification.

'.lhis `invention relates to n n apparatus for cooking'soups, broths, and other ,delicate viands, the apparatus being 'arranged in such a mannets to subject the contents of the cooking-vessel to a slight pressure, which is obtained by the steam which generates in tho apparatus in the act of cooking, and so as to wholly avoid the danger of scorching or burning. I

The accompanying drawing is an axial section of a cooking-vessel embodying my improvements.

The'oxternal cylinder or case A, used as a hot-water jacket, is provided with a removable lid, B, which is held securely in position against the pressure of steam by`means of the loops or handles C C. These handles are adapted to turn freely within'the ears D D', which project from the side of the jacket A, and they are prevented from becoming detached from said ears by the collars c c. The lid B is provided with a small steamchamber, E, having al slight ventage, e, for the escapeof steam, this ventage being' large, enough to prevent any dangerous accumulation of steam, and at the same time small enough to insure a sufficient pressure for the-purpose desired. The broth, soup, or other, viand to be cooked is placed withinan inner vessel or chamber, G, (which I term the digestcr,) somewhat smaller than the other one, and furnished `with aI central hot-water and steamlduct,-H, and is elevated a short distance above the bottom 4of' thejacket A by means of the feet g g. The

:cap Iof this digestcr has a neck, J, which its closely within a collar, K, of the other lid, B, and this neck is provided with a tightly-tting stopper, 1L, ,and another neck, M, on the same cap I embraces the upper end of the steam-duct I-I, A suiicient space is `I'left between the neck Mond the interior of the lsteam-chamber E to allow a free circulation of steam around the top of the digester. Thehandles C c C e serve the several purposes of fastening down the outer cover, and of affording a means of lifting either the entire apparatus or the outer vessel. The outer vessel may be used separately when desired. A very perfect form of my digester might have the interior of the digester enamelled. The lids B and I are first removed from their respective vessels,

`and the soup or other article to be cooked is Apoured into thedigester G, after -which the jacket A is lled with a 4sufficient.quai'itityf'of water, and the two ilids are then placed in their proper position, the outer one being secured by the rotating handles C C. The vessel is'ithen placed over the re, and the contents of the digester are thoroughly cooked by means of the hot water and steam with which it is completely enveloped; and as the `cooking takes place within a closcdwcssel, and -also under a slight pressure, there is no chance for any'of the aromatic properties of the substanccsvtoescapo into the air with the steam which would be continually ascending from an open/vessel. And while the heat due to the confinement and pressure becomes very effective for elaborating the edible qualities, it can never be so excessive as to causo burning or scorching, because it cannot exceed that of the wateryenvelope.

I claim herein as new, and of myinvention- 1. The arrangement substantially as described of the hot-waterjacket A B K, steam-,chamber E c, digester G II I M, and stopper L, as and for the purpose specified.

2. 'In combination with the elements of the preceding clause, I claim the rotatable loops G e C c', serving the `double purpose of handles and of catches.

In testimony of which invention I hereunto sot my hand.

' HENRY ADLER.

Witnesses:

GnofH. KNIGHT, JAMES H. LAYMANt 

